const getEl = str => document.querySelector(str),
	getEls = str => document.querySelectorAll(str),
	addClassName = (el, className) => el.classList.add(className),
	removeClassName = (el, className) => el.classList.remove(className),
	hasClassName = (el, str) => el.classList.contains(str),
	toggleClassName = (el, str) => el.classList.toggle(str);

